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Liquidity (Tables)
6 Months Ended
Jun. 30, 2019
Liquidity [Member]  
Liquidity [Line Items]  
Schedule of expects to satisfy remaining unsatisfied performance obligation

   
2019


Within 1 year
$ 14,324,626

1 to 2 years


34,500,000

Thereafter


21,944,107


Total Backlog
$ 70,768,733